Help on bash script?
smithi at nimnet.asn.au
Sat Aug 13 15:13:31 GMT 2005
On Sat, 13 Aug 2005, Giorgos Keramidas wrote:
> On 2005-08-12 13:38, Benson Wong <tummytech at gmail.com> wrote:
> > I prefer:
> > for COREFILE in `find / -type f -name core -print`
> > do
> > ...
> > done
> > Wouldn't that accomplish the same thing?
> More or less. Less, when the filenames are too many. See questions
> posted on this very same list about ``too many arguments''.
True. Of course if you've got that many core files lying around, you
probably have other things to worry about :)
> The ``while read line; do stuff with $line; done'' loop doesn't suffer
> from the same limitation, but is a bit more expensive in terms of the
> number of spawned processes and (consequently) the time it takes to run.
Maybe measurable. Took me ages to appreciate the difference between say
cat tempfile | while read line; do stuff with $line; done
while read line; do stuff with $line; done < tempfile
when 'stuff' needs to update script-scope variables, despite a slightly
icky, impure feeling about using tempfiles ..
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